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The optic nerve head in hereditary optic neuropathies
Nature Reviews Neurology, 2009Hereditary optic neuropathies are a prominent cause of blindness in both children and adults. The disorders in this group share many overlapping clinical characteristics, including morphological changes that occur at the optic nerve head. Accurate and prompt clinical diagnosis, supplemented with imaging when indicated, is essential for optimum ...
Evelyn C, O'Neill +5 more
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Archives of Ophthalmology, 1984
To the Editor. —In their article in the MayArchives, Bec et al 1 reported on the identification of optic nerve drusen with computed tomography (CT). This capability is well known. Using this method to detect drusen is not cost-effective (a CT scan costs $300 to $400) and exposes the patient to unnecessary radiation.
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To the Editor. —In their article in the MayArchives, Bec et al 1 reported on the identification of optic nerve drusen with computed tomography (CT). This capability is well known. Using this method to detect drusen is not cost-effective (a CT scan costs $300 to $400) and exposes the patient to unnecessary radiation.
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Ultrasonography in optic nerve head avulsion
Acta Ophthalmologica, 1991Abstract The diagnosis of post traumatic optic nerve avulsion is often obscured by the presence of concomitant vitreous haemorrhage. Electrodiagnostic tests, CT scan and fluorescein angiography have not proved helpful in substantiating the diagnosis of this entity in the early stages.
D, Talwar +4 more
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Vascular anatomy of the optic nerve head
Canadian Journal of Ophthalmology, 2008Although intraocular pressure remains the main modifiable risk factor for open-angle glaucoma, other factors such as vascular perfusion likely play a significant role. It is not clear how mechanical deformation, axonal damage, glial responses, and ischemia interact to lead to the tissue remodeling seen clinically as glaucomatous cupping.
Paul J, Mackenzie, George A, Cioffi
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Congenital Malformations of the Optic-Nerve Head
Optometry and Vision Science, 1978ABSTRACT Normal anatomical variations of the eye are a constant source of interest to the clinician. This is particularly true for the optic‐nerve head, where neural, vascular, and supportive tissue converge, each with its own variations. Such diverse anomalies as cleft palate, reduced visual acuity, visual‐field loss, and distortions
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Optic nerve decompression in head injuries
The Journal of Laryngology & Otology, 1981AbstractDiminution of vision arising from head injuries involving the optic foramen can be treated by transethmoidal decompression of the optic froamen can be treated by transethomidal decompression of the optic nerve. Early surgery is associated with good recovery of function.
P P, Karnik +3 more
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Ophthalmoscopic Evaluation of the Optic Nerve Head
Survey of Ophthalmology, 1999Optic nerve diseases, such as the glaucomas, lead to changes in the intrapapillary and parapapillary region of the optic nerve head. These changes can be described by the following variables: size and shape of the optic disk; size, shape, and pallor of the neuroretinal rim; size of the optic cup in relation to the area of the disk; configuration and ...
J B, Jonas, W M, Budde, S, Panda-Jonas
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Angiography of the Glaucomatous Optic Nerve Head
Journal of Glaucoma, 1994An enhanced understanding of the microcirculation and blood flow in glaucoma is needed. Definitive study has been impaired by lack of a quantitative and objective clinical method to measure human optic nerve and peripapillary choroidal blood flow. Through optical sectioning of the optic nerve head and peripapillary retina, confocal scanning laser ...
R N, Weinreb, D U, Bartsch, W R, Freeman
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Optic Nerve Head Drusen and Glaucoma
Archives of Ophthalmology, 1985The simultaneous occurrence of both optic nerve head drusen and glaucoma may make it difficult to evaluate visual field defects and the appearance of the optic nerve head. We saw five patients with both conditions, of whom four had pigmentary glaucoma or pigmentary dispersion syndrome. Drusen do not preclude the development of cupping, and they make it
J R, Samples +3 more
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Segmentation of optic nerve head images
2017 14th International Joint Conference on Computer Science and Software Engineering (JCSSE), 2017Segmentation of the optic nerve head or optic disc in digital retinal fundus photographs is a non-invasive procedure that plays an important role in early detection of abnormalities of the eyes, particularly glaucoma diseases. Developing an automatic system, we employ image processing techniques coupled with graph cut algorithms from combinatorial ...
Punsiri Boonyakiat, Piyanuch Silapachote
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